This title features Hauptkommissar Muller and his sidekick, Pappenheim. When Muller gets an anonymous message on his secure phone, it uncovers a nightmare of secrets that lie beneath the slaughterhouse of Stalingrad and opens up a frightening view into a past that lives on in Germany's present. This is a welcome return for the charming Hauptkommissar and his cynical side-kick Pappenheim.